TPS92510 Datasheet, PDF (1/25 Pages) Texas Instruments – 1.5-A Constant-Current Buck Converter for High-Brightness LEDs with Integrated LED Thermal Foldback

TPS92510
www.ti.com
SLUSAE4A – JANUARY 2012 – REVISED JUNE 2012
1.5-A Constant-Current Buck Converter for High-Brightness LEDs
with Integrated LED Thermal Foldback
Check for Samples: TPS92510
FEATURES
1
•2 3.5-V to 60-V Input Voltage Range
• Integrated 200-mΩ High-Side MOSFET
• 200 mV Internal Voltage Reference
• ±3% LED Current Accuracy
• 100 kHz to 2.5 MHz Switching Frequency
Range
• Dedicated PWM Dimming Input
• LED Thermal Foldback
• Adjustable UVLO
• Overcurrent Protection
• Over-Temperature Protection
• MSOP-10 (DGQ) PowerPAD™ Package
APPLICATIONS
• Street Lighting
• Emergency Lighting
• General Illumination
• Industrial and Commercial Lighting
• MR16 LED Bulbs
DESCRIPTION
The TPS92510 is a 60-V, 1.5-A peak current-mode
step-down converter with an integrated high-side
MOSFET. It is specifically designed for driving high-
brightness LEDs with a constant current. The tight-
tolerance, 200-mV internal reference voltage reduces
power dissipation in the current-sense resistor. A
dedicated pulse width modulation input pin allows
linear control of the light output.
The TPS92510 integrates a thermal foldback feature
that reduces the average output current to ensure
that the sensed LED temperature never exceeds a
specific value, improving the reliability of the overall
system. An integrated frequency synchronization
feature allows a reduction of unwanted beat-
frequencies in multi-string applications and simplifies
EMI filtering. The adjustable input voltage UVLO
feature accommodates the various deep discharge
levels of multiple battery types.
The TPS92510 includes cycle-by-cycle overcurrent
protection, and thermal shutdown protection. It is
available in a 10-pin MSOP PowerPAD™ package.
SIMPLIFIED APPLICATION
TSENSE BOOT
VIN
PH
PDIM
TPS92510
EN
COMP
RT/CLK
Pad
VSENSE
GND
T
UDG-11042
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated